Paper Titles

Mechanical and Transport Properties of Concrete at High Temperatures
p.1

Experimental Characterisation of Parameters Controlling the Compressive Failure of Pultruded Unidirectional Carbon Fibre Composites
p.15

Aspects of Uncertainty Analysis for Large Nonlinear Computational Models
p.25

Detection of Cracking in Gear Teeth Using Acoustic Emission
p.45

Active Sensor Arrays for Damage Detection
p.51

Towards a Hybrid Infrared Approach for Damage Assessment
p.57

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 24-25Experimental Characterisation of Parameters...

Experimental Characterisation of Parameters Controlling the Compressive Failure of Pultruded Unidirectional Carbon Fibre Composites

Article Preview

Abstract:

The classical kink-band formation models predict that the compressive strength of UD carbon fibre reinforced composite materials (UD CFRP) is governed by fibre misalignment as well as of the mechanical shear properties. A new image analysis procedure for experimental determination of the fibre misalignment, the Fourier transform misalignment analysis (FTMA), has been developed. Moreover, a modified asymmetric Iosipescu test specimen geometry has been developed and validated for accurate measurement of the composite material shear properties without parasitic effects due to axial splitting. In the test procedure the shear strain distribution is measured using Digital Image Correlation (DIC) and the results calibrated based on FEA modelling results. Using the measured properties as input, the predictions of the classic compressive strength models have been compared with measured compressive strengths. Finally, an alternative approach to the classical kink band equilibrium has been proposed and demonstrated to provide more accurate predictions than the classical models.

By email Full Text Pdf

You have full access to the following eBook

Advances in Experimental Mechanics VII

Info:

Periodical:

Applied Mechanics and Materials (Volumes 24-25)

Pages:

15-22

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.24-25.15

Citation:

Cite this paper

Online since:

June 2010

Authors:

Ole Thybo Thomsen, K.K. Kratmann

Keywords:

Compressive Failure, Digital Image Correlation (DIV), Fourier Transform Misalignment Analysis (FTMA), Kinkband Formation Models, Modified Iosipescu Test, Pultrusion, UD CFRP

Export:

RIS, BibTeX

Permissions:

Creative Commons CC BY 4.0

[1] H.T. Hahn, J.G. Williams. Failure mechanisms in unidirectional composites. In: Composite materials: testing and design (seventh conference). ASTM STP 893. American Society for Testing and Materials, Philadelphia (1986), 115-139.

DOI: 10.1520/stp35345s

[2] N. A: Fleck NA. Compressive Failure of Fibre Composites. Advances in Applied Mechanics, Vol. 33 (1997), 43-119.

[3] B. Budiansky. Micromechanics. Computers & Structures, Vol. 16 (1983), 3-12.

[4] B. Budiansky, N.A. Fleck. Compressive failure of fibre composites. Journal of the Mechanics and Physics of Solids; Vol. 41, (1993), 183-211.

DOI: 10.1016/0022-5096(93)90068-q

[5] C. Soutis, F.C. Smith, F.L. Matthews. Predicting the compressive engineering performance of carbon fibre-reinforced plastic. Composites: Part A, Vol. 31, (2000), 531-536.

DOI: 10.1016/s1359-835x(99)00103-7

[6] J. Lee, C. Soutis. Thickness effect on the compressive strength of T800/942C carbon fibreepoxy laminates. Composites: Part A, Vol. 36, (2005), 213-227.

DOI: 10.1016/s1359-835x(04)00158-7

[7] J. Lee, C. Soutis. A study on the compressive strength of thick carbon fibre-epoxy laminates. Composite Science and Technology, Vol. 67, (2007); 2015-(2026).

DOI: 10.1016/j.compscitech.2006.12.001

[8] K.K. Kratmann, Evaluation of Compressive Failure of Pultruded Unidirectional Carbon Fibre Composites. Ph.D. Thesis, Special Report No. 67, Department of Mechanical Engineering, Aalborg University, ISBN 87-91464-21-8 (2010).

[9] A.R. Clarke, G. Archenhold, N.C. Davidson. A novel technique for determining 3D spatial distribution of glass fibres in polymer composites. Composites Science and Technology, Vol. 55, (1995), 75-91.

DOI: 10.1016/0266-3538(95)00087-9

[10] A.R. Clarke, G. Archenhold, N.C. Davidson, N.A. Fleck. Determining the power spectral density of the waviness of unidirectional glass fibres in polymer composites. Applied Composite Materials, Vol. 2 (1995), 233-243.

DOI: 10.1007/bf00567194

[11] S.W. Yurgartis. Measurement of small angle fiber misalignments in continuous fiber composites. Composites Science and Technology, Vol. 30 (1987),: 279-293.

DOI: 10.1016/0266-3538(87)90016-9

[12] C.J. Creighton, M.P.F. Sutcliffe, T.W. Clyne. A multiple field image analysis procedure for characterisation of fibre alignment in composites. Composites Part A: Applied Science and Manufacturing, Vol. 32, (2001), 221-229.

DOI: 10.1016/s1359-835x(00)00115-9

[13] K.K. Kratmann, M.P.F. Sutcliffe, L.T. Lilleheden, R. Pyrz and O.T. Thomsen O.T., A novel image analysis procedure for measuring fibre misalignment in unidirectional fibre composites. Composites Science and Technology, Vol. 69, (2009), 228-238.

DOI: 10.1016/j.compscitech.2008.10.020

[14] ASTM D 5379-93. Standard Test Method for Shear Properties of Composite Materials by the V-notched Beam Method. American Society for Testing and Materials, W. Conshohocken, PA (1993).

[15] K.K. Kratmann, K.K., O.T. Thomsen, O.T., L.T. Lilleheden, R. Pyrz. Measurement of the Shear Properties of Unidirectional Carbon Fibre Composites by Using a Modified Iosipescu Test Specimen. Submitted (2010).

[16] K.K. Kratmann, K.K., O.T. Thomsen, O.T., L.T. Lilleheden, R. Pyrz. Experimental Evaluation of the Classical Compressive Strength Models for Unidirectional Carbon Fibre Composites. Submitted (2010).

[17] ISO 14125. Fibre-reinforced plastic composites - Determination of flexural properties. International Organization for Standardization, Geneva, Switzerland (1998. ).

[18] J.I. Bech, S. Goutianos, T.L. Andersen, R.K. Torekov and P. Brøndsted. A new static and fatigue compression test method for composites. Strain (Early on-line), doi: 10. 1111/j. 14751305. 2008. 00521. x.

DOI: 10.1111/j.1475-1305.2008.00521.x

[19] ISO 14126. Fibre-reinforced Plastic Composites - Determination of Compressive Properties in the In-plane Direction. International Organization for Standardization, Geneva, Switzerland. (1999).